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+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+#include "nsIProtocolHandler.idl"
+
+interface nsIFile;
+
+[scriptable, uuid(1fb25bd5-4354-4dcd-8d97-621b7b3ed2e4)]
+interface nsIFileProtocolHandler : nsIProtocolHandler
+{
+ /**
+ * This method constructs a new file URI
+ *
+ * @param aFile nsIFile
+ * @return reference to a new nsIURI object
+ */
+ nsIURI newFileURI(in nsIFile aFile);
+
+ /**
+ * Converts the nsIFile to the corresponding URL string. NOTE: under
+ * some platforms this is a lossy conversion (e.g., Mac Carbon build).
+ * If the nsIFile is a local file, then the result will be a file://
+ * URL string.
+ *
+ * The resulting string may contain URL-escaped characters.
+ * NOTE: Callers should use getURLSpecFromActualFile or
+ * getURLSpecFromDirFile if possible, for performance reasons.
+ */
+ AUTF8String getURLSpecFromFile(in nsIFile file);
+
+ /**
+ * Converts the nsIFile to the corresponding URL string. Should
+ * only be called on files which are not directories. Otherwise
+ * identical to getURLSpecFromFile, but is usually more efficient.
+ * WARNING: This restriction may not be enforced at runtime!
+ */
+ AUTF8String getURLSpecFromActualFile(in nsIFile file);
+
+ /**
+ * Converts the nsIFile to the corresponding URL string. Should
+ * only be called on files which are directories. Otherwise
+ * identical to getURLSpecFromFile, but is usually more efficient.
+ * WARNING: This restriction may not be enforced at runtime!
+ */
+ AUTF8String getURLSpecFromDir(in nsIFile file);
+
+ /**
+ * Converts the URL string into the corresponding nsIFile if possible.
+ * A local file will be created if the URL string begins with file://.
+ */
+ nsIFile getFileFromURLSpec(in AUTF8String url);
+
+ /**
+ * Takes a local file and tries to interpret it as an internet shortcut
+ * (e.g. .url files on windows).
+ * @param file The local file to read
+ * @return The URI the file refers to
+ *
+ * @throw NS_ERROR_NOT_AVAILABLE if the OS does not support such files.
+ * @throw NS_ERROR_NOT_AVAILABLE if this file is not an internet shortcut.
+ */
+ nsIURI readURLFile(in nsIFile file);
+};